9df1183b94
. added safecopies.c: these are library functions to maintain grant tables in own address space . sys_safecopy.c: interfaces to kernel calls to perform safe copy functions in from or to foreign process . changes in i/o fields (type merged with request) reflected in library functions (sys_out.c, sys_vinb.c, sys_vinl.c, sys_vinw.c, sys_voutb.c, sys_voutl.c, sys_voutw.c) . type merged with request in sys_sdevio, also now accepts offset which is used when a grant is specified (the _DIO_SAFE subtype) . system printf() function changed to send DIAGNOSTICS_S messages, which specify a grant id instead of a direct address for the buffer to be printed; tty and log can then safecopy the buffer
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
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#include "syslib.h"
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#include <minix/safecopies.h>
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PUBLIC int sys_safecopyfrom(endpoint_t src_e,
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cp_grant_id_t gr_id, vir_bytes offset,
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vir_bytes address, size_t bytes,
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int my_seg)
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{
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/* Transfer a block of data for which the other process has previously
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* given permission.
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*/
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message copy_mess;
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copy_mess.SCP_FROM_TO = src_e;
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copy_mess.SCP_INFO = SCP_MAKEINFO(my_seg);
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copy_mess.SCP_GID = gr_id;
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copy_mess.SCP_OFFSET = (long) offset;
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copy_mess.SCP_ADDRESS = (char *) address;
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copy_mess.SCP_BYTES = (long) bytes;
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return(_taskcall(SYSTASK, SYS_SAFECOPYFROM, ©_mess));
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}
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PUBLIC int sys_safecopyto(endpoint_t dst_e,
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cp_grant_id_t gr_id, vir_bytes offset,
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vir_bytes address, size_t bytes,
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int my_seg)
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{
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/* Transfer a block of data for which the other process has previously
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* given permission.
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*/
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message copy_mess;
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copy_mess.SCP_FROM_TO = dst_e;
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copy_mess.SCP_INFO = SCP_MAKEINFO(my_seg);
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copy_mess.SCP_GID = gr_id;
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copy_mess.SCP_OFFSET = (long) offset;
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copy_mess.SCP_ADDRESS = (char *) address;
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copy_mess.SCP_BYTES = (long) bytes;
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return(_taskcall(SYSTASK, SYS_SAFECOPYTO, ©_mess));
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}
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